Window-lifter.



.pinion connection, in the fully WINDOW-LETER.

Specification of Letters Patent.

Application leday 27, 1905. Serial No. 262,605.

T o all '11:71am it may concern.'

Be it. known that I, NEWTON R. EVANS, a citizen of the United States, `residing at Richmond, in the county of Wayne and State of Indiana, have invented certain new and useful Im )rovements in ll'indow-Lifters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates tofwindow, skylight, transom, etc., litters. Its object is to provide a device for raising or lowering windows, ventilators. and similar structures, in which the )ower may be immediately applied, whicl shall be composed of parts readily assembled and dismembered, alrdvfshall be so simple in construction that any'part may be made at small cost, and, thereto efeasily replaced in case of breakage. la

This invention is, in fact, within th principle of my invention as disclosed inkfng applicaion N o. 250,588, tiled March 17, 1905, for a window lifter, in which I have described a window lifter having the power applied" through two links to different points of a connecting arm so that I secure a combined pushing and pulling effect. In the forni disclosed in this application I have brought the power and the leverage connection into the closest possible union, there being, for example, in my preferred form of construction as illustrated, about an inch of space from the center of the power shaftto the pointy on the link at which the power is applied. In thc device illustrated the link I use is in the form of a hollow rack bar, or rather in the forni of a hollow arm, the rack being formed on one side, or hattached to one side; and this rack bar engages with apinion attached to or surrouinling the power shafty In the drawing, Figure l is a side elevation with the operation ot the parts indicated, the full lines showing the ventilator closed and the parts inactive; Fig. 2 is a detail showing the links and connecting arm moving to open the ventilator; Fig. 3 is a detail plan view showing power shaft, link and opened position Fig. 4 is a detail illustrating the attach-' ment of the connecting arm to an ear on the ventilator or other device to belifted; Fig. 5 is a detail of a pinion sleeve which 1s adapted to be passed over the power shaft and attached to it; Fig. 6 1s a detail side` elevation Patenteasept. 15, v190e.

UNITED STATESPATENT*Orem-* 1 Y' .issrexon To JOHN A.. Evxxs, oF RICHMOND, l INDiANA. a i' of the shaft, the pinion sleeve and th'erackf hnk, the latter being broken away; .thisfigure illustrating, also, the niode'o removing the rack-pinion from a link. i g

In the drawings, 1 represents a beam gable or other suitable supporting means to which the object to be lifted may be hinged. In this case the illustration may be, forexample, su posed to represent the ventilator vof a green ionse.

2 represents the frame of the greenhouse` and y3 the usual hanger bracket in which the power shaft is journaled, there being, of course, any desired number, de ending upon the size of the structure and t-iie number of ventilators, etc. v l

4 represents a hinged "entilator to be operated by my lifter.

5 is a pipe-shaft joumaled in brackets of which 3 is an example. The shaft may have an operating gear or lever at one or both ends,

or at any point on the shaft, it being understood that this pi e-shaft. is merely one form \of` operating sha t which may be used for transmitting power. At the point of applicat-ion of iny lifter the shaftis surrounded by a rack-pinion, and I referto form this rackpin-ion as illustratet by the part 6, which shows two sleeves joined by a number of short; rods so that the two sleeves and the rods ltogether forni practically a rack-pinion surrounding thepower shaft 5. pinion I preferably castin a single piece, though, of couise,it may be made in any desired manner, it being sullicient that the sleeve is surrounded by a rack-pinion which may be engaged bythe racks, to be hereinaft-er described. one of the sleeves of the rack-pinion set; screws 7, one of which is shown, to secure it in place on the power shaft- S and 9 are yoke rack-links, that is, they are links with a yoke or loop at one end and having on the inner face of one side a rackbar formed either integrally with the loo or yoke or secured thereto by any of the familiar mechanical methods. The rack-link S is pivoted at its outer end at 10 to the connecting arm 1 1, while. the luck-link 9 is pivot-ed at its outer end at the point 12 to the connecting arm 11. In the form illustrated I have preferably made this attaclnnent 12 at the end of the connecting :irin 11, but it should This rack- I preferably also apply on .9

be understood that the Vtachment 1s not essential,

precise point'of at- )rovidino` only vthat the ends of the rack-lin ts S am 9 are attached at different points tothe connecting arm 11 itvbeing of course understood that for the best operation of the device the connecting arm should be pivotcd to the object to be lilted and to the two links at points on opposite sides of its center. The connecting arm 11 is attached at 13 to an ear 14 in the usual manner. At the upper end of each rack-link is an enlargement into which the rack-pinion 6 will fit, so that in applying either one of the links this enlargement 15 may be placed over the rack-pinion, the rack-link then being drawn down and secured in place. The same .provision serves as a. convenient device for permitting the removal of a link or the pinlon at any time.

It will be observed that in this construe# tion the racks ofthe two rack-links or yokes engage the rack-pinion from opposite sides, one eing above the rack-pinion and the other below. In use, when power is applied to the shaft 5 it will rotate the rackinion 6, and this` pinion engaging with the ra exs of the rack-links S and 9 will tIn'ow one racklink in one direction and the direction. That is, it will throw the racklink S, when the shaft is turned as indicated in Fie'. 1, down and outward, while it will pull tIie rack yeke 9 in and upward, so that there is applied to the connecting arm 11 a mostieifective leverage which consists of a combined pulling and pushing effect. The link-racks are crossed, and as these parts move in pushing up. the window as indicated in Fig. 1, all the parts in addition to their action in operation, move around as the window goes up until fmally the rack-links are crossed in the opposite direction from that in which other in the opposite scopes thev are crossed )rior to the lifti'nfI o eration as 1n Figs. `1, 2 and 3. By this construction I secure not only the well-understood direct thrust of a rack and pinion, but I also secure the closest possible application of the power to the link, and I secure at the same tune a combined pushing and pulling action upon the connecting arm. That is to say, I secure the etuivalent of powerful eccentric action, and I llave combined in this device as well as in that of my preceding application a lifting and pulling eect whereby the whole movement of the ventilators is made with a minimum application of power and with no possibility of a dead center.

Having fully described my invention what I claim is :f

1. In a window or other lifter, the coinbination of a power or o erating shaft, a pinion on the sh( ft, rack-linls engaging the pinion from fpposite sides, anda connecting arm to which the rack-links are pivoted.v

2. In a Window or other lifter, the cc1nbi.

nation of a power or operating shaft', a'pinion borne by the shaft, a dair of crosscdfrack-links with opposing racks engaging the pinion, and a connecting arm to which the rack-links are attached.

3. In a window or other lifter, thecombination of a power or operating shaft, yokelinks embracing and engaging the pinion and each having an enlargement at one end through which the pinion may pass, and a tached.

In testimony whereof I aHix my signature, in presence of two Witnesses.

I NEWTON R. EVANS.

Witnesses:

' JOHN A. EVANS,

NrCHoLAs P. MILLER.

connecting arm to which the links are at-V 

